#include <bits/stdc++.h>
using namespace std;
int main() {
int n; cin >> n;
vector<double> a(n), b(n), pref(n);
for(int i=0; i<n; i++) cin >> a[i] >> b[i];
sort(a.rbegin(), a.rend());
sort(b.rbegin(), b.rend());
pref[0] = b[0];
for(int i=1; i<n; i++) pref[i] = pref[i-1] + b[i];
double l=0, r=1e9, ans=0;
while(r - l > 1e-6) {
double mid = (l + r) / 2;
bool ok = 0;
double sum1 = 0;
for(int i=0; i<n&&!ok; i++) {
sum1 += a[i];
if(sum1 - i - 2 < mid) continue;
int mx = min(n-1, (int)((sum1 - i - 2) - mid));
if(pref[mx] - mx - i - 2 >= mid && sum1 - i - 2 - mx >= mid) ok = 1;
}
if(ok) ans = l = mid;
else r = mid;
}
cout << setprecision(4) << fixed << ans << '\n';
return 0;
}
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
1 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
348 KB |
Output is correct |
| 14 |
Correct |
1 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
348 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
1 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
348 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Correct |
0 ms |
348 KB |
Output is correct |
| 5 |
Correct |
0 ms |
348 KB |
Output is correct |
| 6 |
Correct |
0 ms |
348 KB |
Output is correct |
| 7 |
Correct |
1 ms |
348 KB |
Output is correct |
| 8 |
Correct |
0 ms |
348 KB |
Output is correct |
| 9 |
Correct |
0 ms |
348 KB |
Output is correct |
| 10 |
Correct |
0 ms |
348 KB |
Output is correct |
| 11 |
Correct |
0 ms |
348 KB |
Output is correct |
| 12 |
Correct |
1 ms |
348 KB |
Output is correct |
| 13 |
Correct |
1 ms |
348 KB |
Output is correct |
| 14 |
Correct |
1 ms |
348 KB |
Output is correct |
| 15 |
Correct |
1 ms |
348 KB |
Output is correct |
| 16 |
Correct |
1 ms |
348 KB |
Output is correct |
| 17 |
Correct |
68 ms |
2652 KB |
Output is correct |
| 18 |
Correct |
75 ms |
2652 KB |
Output is correct |
| 19 |
Correct |
68 ms |
2652 KB |
Output is correct |
| 20 |
Correct |
68 ms |
2652 KB |
Output is correct |
| 21 |
Correct |
75 ms |
2652 KB |
Output is correct |
| 22 |
Correct |
70 ms |
2780 KB |
Output is correct |
| 23 |
Correct |
72 ms |
2652 KB |
Output is correct |
| 24 |
Correct |
68 ms |
2648 KB |
Output is correct |
| 25 |
Correct |
68 ms |
2652 KB |
Output is correct |
| 26 |
Correct |
74 ms |
2780 KB |
Output is correct |
